PMID- 31156625 OWN - NLM STAT- MEDLINE DCOM- 20200813 LR - 20200813 IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 10 DP - 2019 TI - Dynamics of Expression of Programmed Cell Death Protein-1 (PD-1) on T Cells After Allogeneic Hematopoietic Stem Cell Transplantation. PG - 1034 LID - 10.3389/fimmu.2019.01034 [doi] LID - 1034 AB - Immune exhaustion contributes to treatment failure after allogeneic hematopoietic stem cell transplantation (HSCT) for hematological malignancies. Immune checkpoint blockade, including programmed cell death protein-1 (PD-1) blockade, is a promising strategy to improve the antitumor effect of allogeneic HSCT with high rates of response reported in patients treated for disease relapse. However, severe and sometimes fatal Graft- vs.-Host-Disease (GvHD) has been reported as a complication. Little is known about the dynamics of PD-1 expression on immune effector cells after allogeneic HSCT. In the present study, we analyzed PD-1 expression on T cell subpopulations isolated from 105 allogeneic HSCT recipients. Our analysis revealed a significant increase in proportions of PD-1-expressing CD4 and CD8 T cells early after allogeneic HSCT followed by a progressive normalization of PD-1 expression at CD8 but not CD4 T cell surface. Analysis of co-expression of two other exhaustion markers, 2B4 and CD160, revealed a preferential expansion of PD-1-single positive cells. Moreover, the analysis of granzyme B and perforin expression in PD-1+ and PD-1- CD8 T cells from HSCT recipients did not reveal any impairment in cytotoxic molecules production by PD-1-expressing CD8 T cells. Analyzing the association between clinical factors and the expression of PD-1 on T cells, we identified the use of in vivo and/or ex vivo T-cell depletion as the factor most strongly associated with elevated PD-1 levels on T cells. Our results extend our knowledge of the regulation of PD-1 expression at T cell surface after allogeneic HSCT, a crucial information for the optimization of post-transplantation PD-1 blocking therapies. FAU - Simonetta, Federico AU - Simonetta F AD - Division of Hematology, Department of Oncology, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland. FAU - Pradier, Amandine AU - Pradier A AD - Division of Hematology, Department of Oncology, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland. FAU - Bosshard, Carine AU - Bosshard C AD - Division of Hematology, Department of Oncology, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland. FAU - Masouridi-Levrat, Stavroula AU - Masouridi-Levrat S AD - Division of Hematology, Department of Oncology, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland. FAU - Dantin, Carole AU - Dantin C AD - Division of Hematology, Department of Oncology, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland. FAU - Koutsi, Aikaterini AU - Koutsi A AD - Division of Hematology, Department of Oncology, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland. FAU - Tirefort, Yordanka AU - Tirefort Y AD - Division of Hematology, Department of Oncology, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland. FAU - Roosnek, Eddy AU - Roosnek E AD - Division of Hematology, Department of Oncology, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland. FAU - Chalandon, Yves AU - Chalandon Y AD - Division of Hematology, Department of Oncology, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20190516 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 RN - 0 (B7-H1 Antigen) RN - 0 (PDCD1 protein, human) RN - 0 (Programmed Cell Death 1 Receptor) SB - IM MH - Adolescent MH - Adult MH - Aged MH - B7-H1 Antigen/antagonists & inhibitors MH - CD4-Positive T-Lymphocytes/*immunology MH - CD8-Positive T-Lymphocytes/*immunology MH - Female MH - Graft vs Host Disease/immunology MH - *Hematopoietic Stem Cell Transplantation/adverse effects MH - Humans MH - Male MH - Middle Aged MH - Programmed Cell Death 1 Receptor/*analysis/antagonists & inhibitors MH - Prospective Studies MH - Transplantation, Homologous MH - Young Adult PMC - PMC6531929 OTO - NOTNLM OT - HSCT OT - PD-1 OT - checkpoint inhibitors OT - exhaustion OT - transplantation EDAT- 2019/06/04 06:00 MHDA- 2020/08/14 06:00 PMCR- 2019/01/01 CRDT- 2019/06/04 06:00 PHST- 2019/01/20 00:00 [received] PHST- 2019/04/23 00:00 [accepted] PHST- 2019/06/04 06:00 [entrez] PHST- 2019/06/04 06:00 [pubmed] PHST- 2020/08/14 06:00 [medline] PHST- 2019/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2019.01034 [doi] PST - epublish SO - Front Immunol. 2019 May 16;10:1034. doi: 10.3389/fimmu.2019.01034. eCollection 2019.